From: Mark Holm 
To: atm{at}shore.net
Reply-To: Mark Holm 


Mel Bartels wrote:


> Well, one question that remains unanswered in my mind goes like this.
>
> Are there any modern adhesives that match particular coefficient of
> expansions with commonly used glass (plate, pyrex, whatever), that if used
> with precision ground surfaces to mate, would result in a bond that would
> not distort the glass and that could survive aluminizing and the vagaries of
> time?
>
>


Most modern adhesives, not counting the silicones, are organic polymers (in
the chemists sense) and most organic polymers have considerably higher
coefficient of expansion than glasses.  I don't recall the physical
chemistry explanation for this phenomenon, but it is generally true.

Mark Holm
mdholm{at}telerama.com

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